Electromagnetic ore-separator.



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No. 638,129. 7 Patented Nov. 2a, |899.

E. KnEusEn.

ELECTRUMAGNETIC OBE SEPARATOB.

(Application med my 12, i899.) (No Model.) 2 Sheets-Sheet I.

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E. KREUSER.

Patented N cw.` 28, |899.

ELECTRUMAGNETIC ORE SEPARATOB.

(Application led Hay 12,' 1899.)

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EMIL KREUSER, OF MECI'IERNIGI-I, GERMANY.

ELECTROMAG N ETlC ORE-SEPARATO R.

SPECIFICATION forming part of Letters Patent No. 638,129, dated November 28, 1899.

I Application led May l2, 1899. Serial No. 716,606. (No model.)

To @ZZ whom, t may concern,.-

Be it known that I, EMIL KREUSER, retired director of Royal Mines, a citizen of Germany, residing at Mechernich, Rhine Province, Germany, have invented certain new and useful Improvements in Electromagnetic Ore-Separators, of which the following is a specification.

This invention relates to electromagnetic ore-separators which consist of cylindrical bar-magnets having'wire coils through which electric currents are passed and which are arranged with their poles of opposite sign re volving near to each other, the surfaces of such poles constituting the working magnetic field for separating the ore which is passed between them. When two such cylindrical bzw-magnets are magnetized, they exercise a strong attraction to each other, which tends to lessen the distance between them, and con sequently to do away with the air-space between them necessary for carrying on the ore-separating process. Heretofore it was sought to prevent such approach of the cylinder-magnets either by making the axial bearing sufficiently strong to resist the attraction or by the application of springs between the bearings; but these means only effect the object in an imperfect manner. According to the present invention any such approach of the cylinder-magnets is eectually prevented by providing on the ends as brass, vulcanite, paper material, and the like. ried on a non-magnetic base.

Iron rings might also be used if car- These rings being made to project in such manner that the ring of the one magnet is made to bear firmly against the ring of the second magnet,

the two are pressed together with a force corresponding to the magnetic attraction, and they thus insure a constant distance or airspace being .maintained between the poles, whereby a uniform degree of attraction is exercised by these upon the material passed between them. If now the one cylindrical magnet is driven by suitable external power, thesaid rings or polar-distance keepers will act as fricttional driving-gear, whereby the rotary motion of the one cylinder-magnet will be imparted to the other one. A s these rings take the entire pressure due to the magnetic attraction, the bearings of the cylinder-magnet axes are entirely relieved of such pressure, so that these have only to support the weight of the cylinder-magnet.

It will be seen that by thisinvention all toothed gearing such as has been employed heretofore for transmitting the rotary motion of the one cylindermagnet tothe second one is dispensed with.

The relative speeds of rotation of the two cylinder-magnets can be varied by correspondingly varying the diameter of the pressure-rings or polar distance keepers of the one magnet relatively to those of the other one, which variation of speed offers in many cases advantages in the separation of the ores. Lastly, such polar-distance keepers may be so arranged as to be readily changed, so that if a number of. these of varying relative proportional sizes are provided the relative speeds of the two cylinder-magnets, as also the polar distance thereof, and consequently the polar field, can be changed.

In the accompanying drawings, Figure 1 is a detail longitudinal sectional view of two cylindrical electromagnets having the pressure# rings secured against the end surfaces of the magnets. Fig.` 2 is a similar view showing the manner in which the pressure-rings can be changed, and Fig. 3 is avertical sectional view of a magnetic separator embodying my invention.

A and A are the two cylinder magnets, which are made to revolve in contrary directions. B B represent the wrewindings thereof, the current passing through which effects the magnetizing of the cylinders.

fr are the conductor-rings xed in an insu- ICO screws S on end pieces F, which are preferably made of non-magnetic material, such as brass, vulcanite, papermaterial, and the like. It Will be seen that the rings D D can be readily removed and replaced by others of dierent diameters. Thus in Fig. l the pressure-ring D of cylinder-magnet A is of smaller diameter than the pressure-ring D of A, so that A will revolve at a greater speed than A. On passing an electric current through the cylinder-magnets these tend to approach each other as near as possible. This is prevented bythe polar-distance keepers or pressurerings, which are thus pressed vrirmly against each other, so that on the one magnet being rotated the said rings transmit the rotation in the contrary direction t-o the other magnet.

It will be obvious that in place of making the polar-distance keepers of annular form they may also be made as complete disks,`al though the annular form is preferred for the reasons above stated.

Fig. 3 shows a section of a magnetic separator provided with cylindrical magnets A A' constructed according to this invention. The axes C C revolve in bearings c g and fh, fixed to the framing L. The sliding contactrings r are keyed to the axes on which they are mounted, respectively, and are insulated therefrom, while the brushes m n o p and leads CZ convey the current for exciting the magnets. The lower cylinder is revolved by means of the gearing P and drives the upper cylinder through the contact-rings D D.

Having thus particularly described and ascertained the nature of this invention and the best means I know for carrying the same into practical eifect, I claiml. In electromagnetic ore-separators, two revolnble cylindrical electromagnets having rings at their ends the rings of the one electromagnet being made to bear'against the rings of the other electromagnet so as to maintain a constant polar distance between the magnets against their mutualY attraction, substantially as described.

2. In electromagnetic ore-separators, two revolnble cylindrical electromagnets having rings at their ends the rings of the one electromagnet being made to bear against the rings oi' the other electromagnet, so as to maintain a constant polar distance between the magnets and at the same time serve to transmit the rotary motion of the one magnet tothe other one, substantially as described.

3. 1n electromagnetic ore-separators two revoluble cylindrical electromagnets-having rings at their ends the rings of the one electromagnet being made to bear against the rings of the other electromagnet, said rings being of different diameters so as to impart different speeds of rotation to the two electromagnets, substantially as described.

it. In electromagnetic ore-separators two revoluble cylindrical electromagnets having rings at their ends the rings of the one electromagnet being made to bear against the rings of the other electromagnet, said rings being removable so that by changing them the polar distance between the magnets can be varied, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

EMIL KREUSER.

Vitnesses:

CHAs. E. BARNEs, WILLIAM H. MADDEN. 

